I have a 2002 Trailblazer EXT 4wd. The fan clutch was running on high all the time. I thought the fan clutch was out. So i bought a new one. Didn't fix it. Fan is still running on high and service engine light is on but it comes on stays on and some days it goes off for a little while. It's still giving the same code. Low fan on with High fan running (1482 I think). I checked voltage to the plug, and it's getting voltage, relays are fine, fuses are fine? Anyone have this problem?????? Please Help!